2I 1650 then DL 2138 at Atlanta
Cincinnati → Atlanta → Portland (Maine)
Timetable, Atlanta time
05:542I 1650 from Cincinnati at the gate
20:59DL 2138 to Portland (Maine) leaves the gate
15 h 05 apart on the timetable
DL 2138 leaves 15 h 05 after 2I 1650 arrives on the timetable: more than half a day, so not a connection we count.